Robert P. J. Day | 96532ba | 2008-02-03 15:06:26 +0200 | [diff] [blame] | 1 | #ifndef _LINUX_DMA_MAPPING_H |
| 2 | #define _LINUX_DMA_MAPPING_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | |
| 4 | #include <linux/device.h> |
| 5 | #include <linux/err.h> |
FUJITA Tomonori | f0402a2 | 2009-01-05 23:59:01 +0900 | [diff] [blame] | 6 | #include <linux/dma-attrs.h> |
| 7 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | /* These definitions mirror those in pci.h, so they can be used |
| 10 | * interchangeably with their PCI_ counterparts */ |
| 11 | enum dma_data_direction { |
| 12 | DMA_BIDIRECTIONAL = 0, |
| 13 | DMA_TO_DEVICE = 1, |
| 14 | DMA_FROM_DEVICE = 2, |
| 15 | DMA_NONE = 3, |
| 16 | }; |
| 17 | |
FUJITA Tomonori | f0402a2 | 2009-01-05 23:59:01 +0900 | [diff] [blame] | 18 | struct dma_map_ops { |
| 19 | void* (*alloc_coherent)(struct device *dev, size_t size, |
| 20 | dma_addr_t *dma_handle, gfp_t gfp); |
| 21 | void (*free_coherent)(struct device *dev, size_t size, |
| 22 | void *vaddr, dma_addr_t dma_handle); |
| 23 | dma_addr_t (*map_page)(struct device *dev, struct page *page, |
| 24 | unsigned long offset, size_t size, |
| 25 | enum dma_data_direction dir, |
| 26 | struct dma_attrs *attrs); |
| 27 | void (*unmap_page)(struct device *dev, dma_addr_t dma_handle, |
| 28 | size_t size, enum dma_data_direction dir, |
| 29 | struct dma_attrs *attrs); |
| 30 | int (*map_sg)(struct device *dev, struct scatterlist *sg, |
| 31 | int nents, enum dma_data_direction dir, |
| 32 | struct dma_attrs *attrs); |
| 33 | void (*unmap_sg)(struct device *dev, |
| 34 | struct scatterlist *sg, int nents, |
| 35 | enum dma_data_direction dir, |
| 36 | struct dma_attrs *attrs); |
| 37 | void (*sync_single_for_cpu)(struct device *dev, |
| 38 | dma_addr_t dma_handle, size_t size, |
| 39 | enum dma_data_direction dir); |
| 40 | void (*sync_single_for_device)(struct device *dev, |
| 41 | dma_addr_t dma_handle, size_t size, |
| 42 | enum dma_data_direction dir); |
| 43 | void (*sync_single_range_for_cpu)(struct device *dev, |
| 44 | dma_addr_t dma_handle, |
| 45 | unsigned long offset, |
| 46 | size_t size, |
| 47 | enum dma_data_direction dir); |
| 48 | void (*sync_single_range_for_device)(struct device *dev, |
| 49 | dma_addr_t dma_handle, |
| 50 | unsigned long offset, |
| 51 | size_t size, |
| 52 | enum dma_data_direction dir); |
| 53 | void (*sync_sg_for_cpu)(struct device *dev, |
| 54 | struct scatterlist *sg, int nents, |
| 55 | enum dma_data_direction dir); |
| 56 | void (*sync_sg_for_device)(struct device *dev, |
| 57 | struct scatterlist *sg, int nents, |
| 58 | enum dma_data_direction dir); |
| 59 | int (*mapping_error)(struct device *dev, dma_addr_t dma_addr); |
| 60 | int (*dma_supported)(struct device *dev, u64 mask); |
FUJITA Tomonori | f726f30 | 2009-08-04 19:08:24 +0000 | [diff] [blame] | 61 | int (*set_dma_mask)(struct device *dev, u64 mask); |
FUJITA Tomonori | f0402a2 | 2009-01-05 23:59:01 +0900 | [diff] [blame] | 62 | int is_phys; |
| 63 | }; |
| 64 | |
Andrew Morton | 8f286c3 | 2007-10-18 03:05:07 -0700 | [diff] [blame] | 65 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) |
Borislav Petkov | 34c6538 | 2007-10-18 03:05:06 -0700 | [diff] [blame] | 66 | |
Jiri Slaby | d68412b | 2009-06-18 16:49:18 -0700 | [diff] [blame] | 67 | typedef u64 DMA_nnBIT_MASK __deprecated; |
| 68 | |
Andrew Morton | 8f286c3 | 2007-10-18 03:05:07 -0700 | [diff] [blame] | 69 | /* |
| 70 | * NOTE: do not use the below macros in new code and do not add new definitions |
| 71 | * here. |
| 72 | * |
| 73 | * Instead, just open-code DMA_BIT_MASK(n) within your driver |
| 74 | */ |
Jiri Slaby | d68412b | 2009-06-18 16:49:18 -0700 | [diff] [blame] | 75 | #define DMA_64BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(64) |
| 76 | #define DMA_48BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(48) |
| 77 | #define DMA_47BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(47) |
| 78 | #define DMA_40BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(40) |
| 79 | #define DMA_39BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(39) |
| 80 | #define DMA_35BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(35) |
| 81 | #define DMA_32BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(32) |
| 82 | #define DMA_31BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(31) |
| 83 | #define DMA_30BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(30) |
| 84 | #define DMA_29BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(29) |
| 85 | #define DMA_28BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(28) |
| 86 | #define DMA_24BIT_MASK (DMA_nnBIT_MASK)DMA_BIT_MASK(24) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
James Bottomley | 32e8f70 | 2007-10-16 01:23:55 -0700 | [diff] [blame] | 88 | #define DMA_MASK_NONE 0x0ULL |
| 89 | |
Rolf Eike Beer | d6bd3a3 | 2006-09-29 01:59:48 -0700 | [diff] [blame] | 90 | static inline int valid_dma_direction(int dma_direction) |
| 91 | { |
| 92 | return ((dma_direction == DMA_BIDIRECTIONAL) || |
| 93 | (dma_direction == DMA_TO_DEVICE) || |
| 94 | (dma_direction == DMA_FROM_DEVICE)); |
| 95 | } |
| 96 | |
James Bottomley | 32e8f70 | 2007-10-16 01:23:55 -0700 | [diff] [blame] | 97 | static inline int is_device_dma_capable(struct device *dev) |
| 98 | { |
| 99 | return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE; |
| 100 | } |
| 101 | |
Dan Williams | 1b0fac4 | 2007-07-15 23:40:26 -0700 | [diff] [blame] | 102 | #ifdef CONFIG_HAS_DMA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | #include <asm/dma-mapping.h> |
Dan Williams | 1b0fac4 | 2007-07-15 23:40:26 -0700 | [diff] [blame] | 104 | #else |
| 105 | #include <asm-generic/dma-mapping-broken.h> |
| 106 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
FUJITA Tomonori | dbe6f18 | 2009-06-18 16:49:19 -0700 | [diff] [blame] | 108 | /* for backwards compatibility, removed soon */ |
| 109 | static inline void __deprecated dma_sync_single(struct device *dev, |
| 110 | dma_addr_t addr, size_t size, |
| 111 | enum dma_data_direction dir) |
| 112 | { |
| 113 | dma_sync_single_for_cpu(dev, addr, size, dir); |
| 114 | } |
| 115 | |
| 116 | static inline void __deprecated dma_sync_sg(struct device *dev, |
| 117 | struct scatterlist *sg, int nelems, |
| 118 | enum dma_data_direction dir) |
| 119 | { |
| 120 | dma_sync_sg_for_cpu(dev, sg, nelems, dir); |
| 121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
FUJITA Tomonori | 589fc9a | 2008-09-12 19:42:34 +0900 | [diff] [blame] | 123 | static inline u64 dma_get_mask(struct device *dev) |
| 124 | { |
FUJITA Tomonori | 07a2c01 | 2008-09-19 02:02:05 +0900 | [diff] [blame] | 125 | if (dev && dev->dma_mask && *dev->dma_mask) |
FUJITA Tomonori | 589fc9a | 2008-09-12 19:42:34 +0900 | [diff] [blame] | 126 | return *dev->dma_mask; |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 127 | return DMA_BIT_MASK(32); |
FUJITA Tomonori | 589fc9a | 2008-09-12 19:42:34 +0900 | [diff] [blame] | 128 | } |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | extern u64 dma_get_required_mask(struct device *dev); |
| 131 | |
FUJITA Tomonori | 6b7b651 | 2008-02-04 22:27:55 -0800 | [diff] [blame] | 132 | static inline unsigned int dma_get_max_seg_size(struct device *dev) |
| 133 | { |
| 134 | return dev->dma_parms ? dev->dma_parms->max_segment_size : 65536; |
| 135 | } |
| 136 | |
| 137 | static inline unsigned int dma_set_max_seg_size(struct device *dev, |
| 138 | unsigned int size) |
| 139 | { |
| 140 | if (dev->dma_parms) { |
| 141 | dev->dma_parms->max_segment_size = size; |
| 142 | return 0; |
| 143 | } else |
| 144 | return -EIO; |
| 145 | } |
| 146 | |
FUJITA Tomonori | d22a696 | 2008-02-04 22:28:13 -0800 | [diff] [blame] | 147 | static inline unsigned long dma_get_seg_boundary(struct device *dev) |
| 148 | { |
| 149 | return dev->dma_parms ? |
| 150 | dev->dma_parms->segment_boundary_mask : 0xffffffff; |
| 151 | } |
| 152 | |
| 153 | static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask) |
| 154 | { |
| 155 | if (dev->dma_parms) { |
| 156 | dev->dma_parms->segment_boundary_mask = mask; |
| 157 | return 0; |
| 158 | } else |
| 159 | return -EIO; |
| 160 | } |
| 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | /* flags for the coherent memory api */ |
| 163 | #define DMA_MEMORY_MAP 0x01 |
| 164 | #define DMA_MEMORY_IO 0x02 |
| 165 | #define DMA_MEMORY_INCLUDES_CHILDREN 0x04 |
| 166 | #define DMA_MEMORY_EXCLUSIVE 0x08 |
| 167 | |
| 168 | #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY |
| 169 | static inline int |
| 170 | dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, |
| 171 | dma_addr_t device_addr, size_t size, int flags) |
| 172 | { |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static inline void |
| 177 | dma_release_declared_memory(struct device *dev) |
| 178 | { |
| 179 | } |
| 180 | |
| 181 | static inline void * |
| 182 | dma_mark_declared_memory_occupied(struct device *dev, |
| 183 | dma_addr_t device_addr, size_t size) |
| 184 | { |
| 185 | return ERR_PTR(-EBUSY); |
| 186 | } |
| 187 | #endif |
| 188 | |
Tejun Heo | 9ac7849 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 189 | /* |
| 190 | * Managed DMA API |
| 191 | */ |
| 192 | extern void *dmam_alloc_coherent(struct device *dev, size_t size, |
| 193 | dma_addr_t *dma_handle, gfp_t gfp); |
| 194 | extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr, |
| 195 | dma_addr_t dma_handle); |
| 196 | extern void *dmam_alloc_noncoherent(struct device *dev, size_t size, |
| 197 | dma_addr_t *dma_handle, gfp_t gfp); |
| 198 | extern void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr, |
| 199 | dma_addr_t dma_handle); |
| 200 | #ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY |
| 201 | extern int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, |
| 202 | dma_addr_t device_addr, size_t size, |
| 203 | int flags); |
| 204 | extern void dmam_release_declared_memory(struct device *dev); |
| 205 | #else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */ |
| 206 | static inline int dmam_declare_coherent_memory(struct device *dev, |
| 207 | dma_addr_t bus_addr, dma_addr_t device_addr, |
| 208 | size_t size, gfp_t gfp) |
| 209 | { |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | static inline void dmam_release_declared_memory(struct device *dev) |
| 214 | { |
| 215 | } |
| 216 | #endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */ |
| 217 | |
Arthur Kepner | 74bc7ce | 2008-04-29 01:00:30 -0700 | [diff] [blame] | 218 | #ifndef CONFIG_HAVE_DMA_ATTRS |
| 219 | struct dma_attrs; |
| 220 | |
| 221 | #define dma_map_single_attrs(dev, cpu_addr, size, dir, attrs) \ |
| 222 | dma_map_single(dev, cpu_addr, size, dir) |
| 223 | |
| 224 | #define dma_unmap_single_attrs(dev, dma_addr, size, dir, attrs) \ |
| 225 | dma_unmap_single(dev, dma_addr, size, dir) |
| 226 | |
| 227 | #define dma_map_sg_attrs(dev, sgl, nents, dir, attrs) \ |
| 228 | dma_map_sg(dev, sgl, nents, dir) |
| 229 | |
| 230 | #define dma_unmap_sg_attrs(dev, sgl, nents, dir, attrs) \ |
| 231 | dma_unmap_sg(dev, sgl, nents, dir) |
| 232 | |
| 233 | #endif /* CONFIG_HAVE_DMA_ATTRS */ |
| 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | #endif |